Positrons are the antiparticles of electrons, and were foreseen by the Dirac equation in 1927. They were discovered in experiments done by C.D.Anderson in USA, P.M.S Blackett and G.Occhialini in Europe. Anderson and Blackett obtained a Nobel prize, Occhialini did not. He was only an Italian. I have known him personally in Milano and visited him at his cottage at Passo delle Radici in the Apennines. I gained his esteem by identifying some peaks in the Alpi Apuane, visible from his home.
Tullio

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Hehe:)
Maybe there are ET's out there somewhere that are made of anti-matter.
Who knows.
Oh-oh. Please don't come near us.

They were discovered in experiments done by C.D.Anderson in USA, P.M.S Blackett and G.Occhialini in Europe. Anderson and Blackett obtained a Nobel prize, Occhialini did not. He was only an Italian

And Anderson's father was Carl David Anderson and his mother Emma Adolfina Ajaxson, originally a Swedish emigrant.
Yes. The Nobel Prize is almost always controversial.

Positrons are the first examples of antimatter particles, then came nucleons. At CERN in Geneva they are creating antimatter atoms, with positrons circling a nucleus made of antineutrons and antiprotons.
Tullio

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Positrons are the antiparticles of electrons

you mean the opposite of electrons, the reflect in the mirror. but i dont see why people called them anti matter.

Sort of.
Maybe they could be called mirror particles instead.
But that doesn't work so well with anti-particles that has no charge like anti-neutrons.

you mean the opposite of electrons...

He means antiparticles.... they are literally"anti"-matter as they perfectly annihilate "normal" matter on contact into energy as per old Albert's famous equation, thus the name.

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One big question in cosmology is; why is the Universe made up mostly from matter and very little antimatter? Yet the Standard Model equations do not foresee such disparity. They are symmetric.
Tullio

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Yes. Very strange.
https://home.cern/topics/antimatter/matter-antimatter-asymmetry-problem
Or is it some uncertainty principle here like the Heisenberg uncertainty principle?
That an outcome of an experiment cannot be 100% certain?

btw. Come think that anti-neutrons consists of anti-quarks so there is a mirror variant of neutrons.

My personal hypothesis is that our universe is one of a virtual particle-antiparticle pair as is found on a very tiny scale, so the "anti"-universe went speeding off in another direction but will eventually meet again... it all has to balance and cancel out of course or we'd be getting something for nothing. :^)

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There are particles that are their own antimatter. They are called Majorana fermions, from the name of the physicist who proposed their existence and disappeared mysteriously in 1938, last seen on a ship from Palermo to Naples. Enrico Fermi wrote a letter to Mussolini asking for police help, and Mussolini replied " Voglio che si trovi" (I want him to be found). But even Mussolini's powerful police could not find Majorana.
Tullio

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The Quantum World is filled with surprises, like Alice's Wonderland. One can image the dismay of a German born Swiss Herr Professor like Albert Einstein in discovering the consequences of his explanation of the photoelectric effect. God does not play dice, he said. To which Wolfgang Pauli replied: not even you can tell God what he can or cannot do.
Tullio

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Speak of the devil.
Scientists on the DUNE collaboration think that neutrinos may help answer one of the most pressing questions in physics: why we live in a universe dominated by matter. In other words, why we are here at all.
First particle tracks seen in prototype for international neutrino experiment
http://news.fnal.gov/2018/09/first-tracks-in-prototype-for-neutrino-experiment/

The enormous ProtoDUNE detector — the size of a three-story house and the shape of a gigantic cube — was built at CERN, the European laboratory for particle physics, as the first of two prototypes for what will be a much, much larger detector for the DUNE project, hosted by the U.S. Department of Energy’s Fermi National Accelerator Laboratory in the United States. When the first DUNE detector modules record data in 2026, they will each be 20 times larger than these prototypes. There will be four modules in total.

DUNE http://www.fnal.gov/pub/science/lbnf-dune/index.html

When superluminal neutrinos were said to have been detected at the Gran Sasso National underground Laboratory (false), about 600 km from CERN where the neutrinos were produced, an Italian woman who was minister of University and Research complimented the physicists for having bored a 600 km tunnel traveled by the neutrinos, with an official press statement. The statement ended in school textbooks published by a Mondadori associate, and it was the mother of a primary school student who discovered it. Sorry, we made a mistake.Errore di stumpa, we used to say instead of errore di stampa, a typical excuse. But once something is printed there is no way to modify it.
Tullio

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I have enrolled in the second part of a course "Building blocks of a quantum computer" by Delft Technical University in Nederlands. It is free, unless I want a Diploma, but that is granted only if I get a passing grade in the tests. In the first part I did not made it, so I did not pay (about 43 euros).
Tullio

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It is now three weeks since the last post here, So I'm taking that as an indication that people that wanted to have had their say.

If so, I'll leave it a couple more days then ask for the thread to be closed.

Sixty days no posts it locks by itself. ET does this.

What you do on your own threads is down to you. Suggest you ignore thread if you can't find anything to contribute.